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Press release | Climate
An international group of researchers led by LSCE (CEA-CNRS-UVSQ) has published a thorough budget of methane sources and sinks* over the last decade in the Earth System Science Data journal, complemented by en editorial in Environmental Research Letters, both to be published on December 12 2016. These studies show that none of the scenarios of the 5th IPPC1 report correspond to the observed increase in methane concentrations. The published results highlight the contribution of methane on the climate change.
Methane is the second anthropogenic greenhouse gas after carbon dioxide (CO2). However, methane, as a greenhouse gas is 28 times more powerful than carbon dioxide (on a 100-year time horizon).
Since 1750, its atmospheric concentration has more than doubled due to human activities. After a period of stabilizations in the early 2000s, methane concentrations are rising again since 2007, and faster than at any time in the past two decades since 2014.
The methane budget published in ESSD shows that:
The Global Methane Budget 200-2012, Saunois et al., Earth System Science Data, 8, 1-55, December 12 2016
The growing role of methane in anthropogenic climate change, Saunois M., Jackson R., Bousquet P., Poulter B. and Canadell J. G., Environnemental Research Letters, December 12 2016
About the Global Carbon Project and the Global carbon Atlas
The Global Carbon Project aims at assisting the international science community to collaborate on the carbon budget through a partnership between the International Geosphere-Biosphere Programme and Future Earth. It produces an annual report on the data on the carbon sources and sinks due to human activities and how they affect the environment. Each year, the data set is made available through the Global carbon Atlas thanks to the support of Fondation BNP Paribas. Available in five languages (English, French, Spanish, Chinese and Russian) at www. Globalcarbonatlas.org.
CEA is a French government-funded technological research organisation in four main areas: low-carbon energies, defense and security, information technologies and health technologies. A prominent player in the European Research Area, it is involved in setting up collaborative projects with many partners around the world.